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When I have multiple Chrome windows open, Docky correctly groups them into one icon on the dock. However, what I want to do is launch a Chrome application launcher (with the --app= command line switch) and have it launch to a separate icon that operates completely independently from my regular Chrome icon.

I can currently achieve only part of this. Following the advice here (http://goo.gl/OiTUz) I created the following launcher for Gmail, with an altered StartupWMClass, which I then dropped onto the dock:

#!/usr/bin/env xdg-open

[Desktop Entry]
Version=1.0
Name=Gmail
Exec=/opt/google/chrome/google-chrome --app="https://mail.google.com/mail"
Terminal=true
Icon=chrome-https___mail.google.com_mail
Type=Application
Categories=Network;WebBrowser;
StartupWMClass=chrome-gmail
Name[en_US]=Gmail

That launcher does create a separate icon in the dock, and that icon only contains the application mode window created by this launcher. However, my pre-existing Chrome launcher also matches the application mode window and snares it as well. For example, if I have three regular Chrome windows open and click the Gmail launcher above, the Gmail icon will only contain the application mode window, but the regular Chrome icon will now contain four windows.

Is there something else I can do to make the application mode window ONLY match to the application mode launcher?

Currently on a machine with Ubuntu 10.04 and Docky 2.1.0 from the Docky PPA.

2 Answers 2

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Paste this code below into the command line, it should work fine. google-chrome --user-data-dir=~/.gmail --app=http://www.gmail.com --class=Gmail $*

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    Fascinating @Orlando! The combination of class AND the separate user-data-dir seems to branch it off... into the same group as whatever terminal I'm using. :P Putting the launcher in Docky spawns a new icon, and when launching it from GNOME, there's no option to pin to dock. Any tips for getting it to persist to the dock? Commented Mar 28, 2011 at 0:01
  • 1
    I wouldn't be able to tell you.. I don't use gnome. However, I think there is a workaround for the docky problem somewhere in launchpad. EDIT: found it bugs.launchpad.net/docky/+bug/425938
    – Orlando
    Commented Mar 28, 2011 at 19:26
  • Didn't work for me. Commented Jun 5, 2020 at 8:08
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Add --class=chrome-gmail at the end of the command line.

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    Care to explain what flag that enables @brx?
    – Ivo Flipse
    Commented Jan 28, 2011 at 15:18
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    Unfortunately, that doesn't seem to work. The window is still grouped with other Chrome windows. Commented Feb 14, 2011 at 17:43

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